Dear OptiPNG users,
OptiPNG version 0.7.4, containing a security fix for all previous 0.7.x versions, has been released. (This is a follow-up on the fix issued in version 0.7.3.) We strongly recommend upgrading.
Version Hg has been fixed also.
Version 0.6.5 and earlier are not affected.
See the Security Information section for more details.